EP0126571A2 - Wärmetauscher - Google Patents

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Publication number
EP0126571A2
EP0126571A2 EP84302982A EP84302982A EP0126571A2 EP 0126571 A2 EP0126571 A2 EP 0126571A2 EP 84302982 A EP84302982 A EP 84302982A EP 84302982 A EP84302982 A EP 84302982A EP 0126571 A2 EP0126571 A2 EP 0126571A2
Authority
EP
European Patent Office
Prior art keywords
heat
carrying liquid
liquid
heat exchanger
heat exchange
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP84302982A
Other languages
English (en)
French (fr)
Other versions
EP0126571A3 (de
Inventor
Takashi Miyagawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP1983068318U external-priority patent/JPS59180168U/ja
Priority claimed from JP10950283U external-priority patent/JPS6018726U/ja
Priority claimed from JP58134671A external-priority patent/JPS6026230A/ja
Priority claimed from JP58171662A external-priority patent/JPS6064186A/ja
Priority claimed from JP14463483U external-priority patent/JPS6055899U/ja
Application filed by Individual filed Critical Individual
Publication of EP0126571A2 publication Critical patent/EP0126571A2/de
Publication of EP0126571A3 publication Critical patent/EP0126571A3/de
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
    • F28D20/0034—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using liquid heat storage material
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
    • C09K5/20—Antifreeze additives therefor, e.g. for radiator liquids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D11/00—Central heating systems using heat accumulated in storage masses
    • F24D11/002—Central heating systems using heat accumulated in storage masses water heating system
    • F24D11/003—Central heating systems using heat accumulated in storage masses water heating system combined with solar energy
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D12/00—Other central heating systems
    • F24D12/02—Other central heating systems having more than one heat source
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S80/00—Details, accessories or component parts of solar heat collectors not provided for in groups F24S10/00-F24S70/00
    • F24S80/20—Working fluids specially adapted for solar heat collectors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/20—Solar thermal
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/40—Solar thermal energy, e.g. solar towers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/14—Thermal energy storage
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/10—Process efficiency

Definitions

  • water is used as the heat carrying medium for heat exchange because it has a large specific heat so as to be excellent in heat-storing capacity.
  • the heat exchanger using water as the heat carrying medium has disadvantages in that the temperature rise is too slow for handy use, that too large a quantity of heat is required for heating the heat carrying liquid, and that the heat exchange efficiency is too low.
  • a heat source with high thermal output is required to accelerate the temperature rise.
  • the heat source use has generally been made of gas or kerosene which, though inexpensive, has a possibility to cause fires or explosions, is hard to be put under continuous temperature control, and makes the resulting system large-scaled. Electrical energy, which is safe to use and allows continuous temperature control, has been used only in limited cases because of its inferior economy.
  • the object of the present invention is to offer a heat exchanger which is characterized in that the temperature rise of heat carrying liquid is rapid even with a heat source of small output, that manageability is still high even for short-term use, that the heat exchange efficiency is so high as to be economic, that the circulation duct, etc. filled with the heat carrying liquid may be kept open to atmosphere, making pressureproof structure unnecessary to be adopted, and that the heat carrying liquid is hard to freeze and contains no corrosive matters, increasing the system durability.
  • the above object has been effected by using as the heat carrying liquid such a liquid as ethylene glycol which has a higher boiling point, a lower melting point, and a smaller specific heat than water.
  • a heat carrying liquid As a heat carrying liquid 1, use is made of such a liquid as has a higher boiling point, a lower melting point, and a smaller specific heat than water.
  • Liquids which may be used as the heat carrying liquid 1 should be such non-volatile, slightly viscous liquids as ethylene glycol, tri(ethylene glycol), poly(ethylene glycol), propylene glycol, poly(propylene glycol), di(ethylene glycol), hexylene glycol, and silicone oil.
  • ethylene glycol tri(ethylene glycol), poly(ethylene glycol), propylene glycol, poly(propylene glycol), di(ethylene glycol), hexylene glycol, and silicone oil.
  • the heat exchanger of the present invention comprises a circulation duct section which includes a heat exchange section and a heating section and is filled with the heat carrying liquid 1. Description will first be made of an example application of the heat exchanger of the present invention for use as a heating system.
  • the heat carrying liquid 1 is allowed to circulate through a circulation duct section 2 by a pump, and is heated at a heating section 4 provided with an electric heater 5 inside.
  • the circulation duct section 2 is multiply bent, so as to be increased in its radiation area, in a heat exchange section 6, where the circulation duct section 2 is in contact with a metallic radiation plate 7.
  • the total heat storing capacity is to be increased by providing the circulation duct section 2 with a reservoir tank 8, thus allowing a long-term heat radiation.
  • a three-way valve 9 and a shortcut path 10 are provided to keep the heat carrying liquid 1 from passing into the heat exchange section 6.
  • This provision of the three-way valve 9 and the shortcut path 10 is useful because a dump radiation from the heat exchange section 6 is possible if we heat previously the heat carrying liquid 1 inside the revervoir tank 8 to a high temperature by applying the three-way valve 9 and the shortcut path 10 so as to keep the heat carrying liquid 1 from circulating through the heat exchange section 6 and if we then open the three-way valve 9 to let the previously- heated heat carrying liquid 1 all at once into the heat exchange section 6.
  • Floor heating using the present system is effected by laying the heat exchange section 6 over the floor inside a room.
  • FIG. 2 An example of actual application is illustrated in Fig. 2, where plural heat exchange sections 6 are connected in series and then connected to the heating section 4. With this connection, the pump 3 forces the heat carrying liquid 1 to pass in sequence through each of the heat exchange sections 6 giving off its heat.
  • the piping work for the heat exchange sections 6 is very easy since the heat exchange sections 6 are to be connected in series.
  • An auxiliary heating section 11 is inserted in series in the circulation duct section 2 on the inlet side of a desirable set of heat exchange sections 6 in order to establish the prescribed inside temperature distribution.
  • the heat carrying liquid 1 of small specific heat may get heated up by the auxiliary heating section 11 with such a rapidly-rising temperature that the amount of radiation at the desirable heat exchange sections 6 may be increased in a short period of time.
  • the heating section 4 is provided with a preheater 14 together with the electric heater 5.
  • the control circuit for the preheater 14, electric heater 4, and pump 3 is illustrated in Fig. 5. While the heating system is not in use, i.e., while the switch 15 is turned off, turning on a power supply switch 16 will drive a relay 17 to turn ON a contact l8, which in turn drives the pump 3 to move the heat carrying liquid within the circulation duct section.
  • the preheater 14 is subject to on-off control to keep the heat carrying liquid 1 at 10-15°C.
  • the electric heater 5 may be used also as the preheater 14 or the auxiliary heater 11, shown in Fig. 2, may be used for preheating.
  • An expansion chamber 25, as shown in Fig. 4, is connected to the circulation duct section 2.
  • the circulation duct section 2 need not be of pressureproof structure.
  • the heat carrying liquid 1 has such a high boiling point that its quantity will not be caused to decrease significantly due to vaporization.
  • the heat carrying liquid has a higher viscosity than water and thus, even when the expansion chamber 25, opened to atmosphere, is set at a level lower than that of the heat exchange section 6, none of the heat carrying liquid 1 will flow out of the expansion chamber 25.
  • the expansion chamber 25, the heating section 4, or the pump 3 may be made conveniently out of the way by being disposed beneath the floor.
  • a heat carrying liquid 1 is filled in a circulation duct section 30.
  • a frame 31 is opened forward and backward so that air flow may be allowed.
  • the circulation duct section 30 is drawn out of the frame 31 through the side wall of the frame 31.
  • the heat carrying liquid 1 is heated outside the frame by an electric heater 5 and allowed to radiate heat at a heat exchange section 33 where the duct 30 inside the frame 31 is multiply bent and provided over its outer surface with fins 32 for increasing the radiation area.
  • a fan 34 sends air vertically to the plane comprising the heat exchange section 33; the air flow is heated while passing through the heat exchange section 33, being blown out in hot air.
  • heating of the heat carrying liquid 1 for a long period with the electric heater 5 set at a low output rate results in storage at a high temperature of the heat of electric heater 5 because of the small specific heat and high boiling point of the heat carrying liquid 1, and thus, when in use as a heating system, it continues to radiate heat to warm the room to some extent during the long-term low-output heating, and as soon as the fan 34 begins to operate, hot air at a high temperature immediately gets blown out to warm the room rapidly and the heat carrying liquid 1 keeps heat radiation for a long period.
  • a heat exchanger proper 40 in a form of box, is formed on a triple-walled structure with a heat insulator 41 sandwiched.
  • the proper 40 is filled with a heat carrying liquid 1 and has a pair of electric heaters 42 in a form of panel fixed as a heating source for heating the heat carrying liquid 1.
  • a flow pipe 43 serving as a liquid flow path, which is in a form of spiral so as to have a large contact area.
  • the flow pipe 43 penetrates the proper 40 liquid-tight and its lower and upper ends are connected with a water supply pipe and a hot-water supply pipe, respectively.
  • the water supply pipe 44 supplies water from a water supply source not shown in the figure and the water supplied is subject to heat exchange with the heat carrying liquid 1 during passage through the flow pipe 43, flowing out into the hot-water supply pipe 45, In this example application, water is subject to heat exchange with the heat carrying liquid 1.
  • the hot-water supply pipe 45 is connected to a hot-water outlet provided in a bathtub or kitchen and thus, the water flowing through the hot-water supply pipe 45 after heat exchange is to be supplied to the above-mentioned hot-water outlet.
  • a supply opening 46 capable of open and close, is for supplying the heat carrying liquid 1 into the proper 40; it is kept closed with a cap 47 except during the time of supply.
  • each electric heater 42 is turned on to heat the heat carrying liquid 1 and when the heat carrying liquid 1 has reached a prescribed temperature, water is supplied from the water supply pipe 44 to the flow pipe 43; the water is heated up to a high temperature through heat exchange undergone with the hot heat carrying liquid 1 during passage through the flow pipe, being supplied from the hot-water supply pipe 45 to the hot-water outlet in hot water.
  • the heating of the heat carrying liquid 1 proceeds with high efficiency since each electric heater 42 is completely envelop ed with the heat carrying liquid 1.
  • the heat carrying liquid 1 may be kept in a state of heat accumulation at a sufficiently high temperature by being continuously heated with an electric heater 42 of small capacity; passage of water through the flow pipe with the heat carrying liquid 1 thus arranged will supply us with heated steam.
  • the heat carrying liquid 1 is usually not decreased in its charged quantity since it is non-volatile and is kept in a closed system; however, in case of occprrence of a decrease, a simple supply through the supply opening 46 into the proper 40 will do.
  • the means for heating the heat carrying liquid 1 is not restricted to the electric heater 42 but various modifications are available depending on the usage. Prevention of the heat carrying liquid 1 from decreasing in charged quantity may more efficiently be effected by covering the heat carrying liquid 1 with a liquid having a small specific weight and a roughly equal boiling point.
  • a solar-heat collecting section 50 has a wide light-receiving face and such an internal volume as can holds the minimum required quantity of heat carrying liquid l.
  • An electric heater section 51 consists of a thermally-insulated box and an electric heater 52 provided in the box.
  • An heat storing section 53 consists of a thermally-insulated box and a heating coil 54 provided at the bottom of the box.
  • a supply pipe 56 for supplying a heat storing medium 55 penetrates the lower wall section of the box and a discharge pipe 57 for discharging the heat storing medium 55 penetrates the upper wall section of the box.
  • the heat storing medium 55 water is used for hot-water supplying purpose and, on the other hand, water, ethylene glycol, or else may suitably be used for heating purpose according to the usage.
  • the heat carrying liquid 1 is filled in a circulation duct 58 of adiabatic structure so that it may circulate through the solar-heat collecting section 50, the heating coil 54, and the electric heater section 51.
  • Pumps 59 are each provided on the circulation duct 58 and the discharge pipe 57 to drive the heat carrying liquid 1 and the heat storing medium 55, respectively.
  • Each of the circulation duct 58 and the discharge pipe 57 is provided with an expansion tank 60, a gas release valve 61, and a safety valve 62.
  • a 4-way switchover valve 65 is provided on the circulation duct 58; switching over this valve 65 to one direction may form the circulation flow path of the heat carrying liquid 1, i.e., the flow path through the electric heater section 51, the solar-heat collecting section 50, and the heating coil 54; on the other hand, switching over the valve 65 to the other direction may connect pipes 66 and 67 extending, respectively, from the upper and lower sections of the solar-heat collecting section 50 and, at the same time, connect pipes 68 and 69 extending, respectively, from the upper section and heating-coil side of the electric heater section 51, thus preventing the radiation from the solar-heat collecting section 50.
  • a light sensor 64 for checking the presence and absence of sunlight, is provided near the solar-heat collecting section 50. In the absence of sunlight, for example, at night, the light sensor 64 will drive the 4-way switchover valve 65 so that there will be formed a direct connection between the electric heater section 51 and the heating coil 54.
  • the light sensor 64 may be replaced by a thermal sensor; in this case of replacement, another thermal sensor is employed to measure the temperature of the heat carrying liquid I at the heating coil 54 or within the electric heater section 51 and the temperature difference between the two thermal sensors is designed to allow the 4-way switchover valve 65 to be driven.
  • the structure described above allows the heat carrying liquid 1 to circulate through the solar-heat collecting section 50 while the sun is shining, i.e., solar heat is ready to be utilized.
  • the heat carrying liquid 1 can approach the maximum temperature available for the sun actually shining very soon after the beginning of circulation since the heat carrying liquid 1 has a small specific heat and the volume inside the solar-heat collecting section 50 is small.
  • the heat carrying liquid 1 thus heated to a high temperature is forced by the pump 59 toward the heating coil 54.
  • the heat storing medium 55 may be heated rapidly to a high temperature since the heat carrying liquid 1 is at a high temperature, has a small specific heat, and radiates heat in large quantity at the heat storing section 53.
  • the 4-way switchover valve 65 is to be changed over to the other direction to have a direct connection between the electric heater section 51 and the heating coil 54, thereby preventing heat radiation from the solar-heat collecting section 50 and at the same time the electric heater is to be put into operation to supplement the shortage of the heat storage by solar heat.
  • a heat exchanger shown in Fig. 10, which corresponds to a dual-structured vessel with the heat carrying liquid 1 contained in its enclosed space and which is used to heat a material in the vessel.
  • the example heat exchanger of Fig. 10 is used for a frying pan.
  • a frying pan 70 is prepared by fusing together an upper pan 71 and a lower pan 72 large enough to cover the outer surface of the upper pan 71 in such a way that the upper edge of the lower pan 72 is connected close to the upper edge of the upper pan 71, thereby forming a processing section 73 and a dual-structured enclosed section 74.
  • An electric heater 75 is provided within the enclosed section 74 on the bottom of the pan 70. When a burner is used as heat source, the bottom face is to be heated.
  • Frying oil is put into the processing section 73 and the enclosed section 74 is filled with a heat carrying liquid 1 with such a boiling point as matches the temperature at which the processing section works for heating the material to be processed.
  • Fins 76 are attached on the outer wall of the upper pan 71 out of contact with the lower pan 72. They serve to make uniform the convection of the heat carrying liquid 1 as well as to convey heat to the upper pan 71.
  • Fig. 12 enlarges the fused section between the upper pan 71 and the lower pan 72.
  • an expansion chamber 77 communicates to the enclosed section via a pipe 78 penetrating the fused section so that the heat carrying liquid 1, when caused to expand by heating, may flow into the expansion chamber 77.
  • the cover of the expansion chamber 77 has pinholes 79 bored to keep the inside of the expansion chamber 77 at atmospheric pressure.
  • a temperature controller 80 for controlling the temperature of the frying oil, puts the electric heater 75 under on-off control in conjunction with a temperature sensor 81 which is provided at a suitable position within the enclosed section 74 and serves to detect the temperature of the heat carrying liquid 1.
  • the temperature controller 80 is first set at a prescribed temperature and then the electric heater 75 is turned on.
  • the heat carrying liquid 1 will be heated up to the temperature set by the temperature controller 80 without boiling since it has a high boiling point; the temperature rise will be completed in a short period since the heat carrying liquid 1 has a small specific heat.
  • the heating of frying oil in the processing section 73 is performed efficiently since the heat carrying liquid 1, while being heated, on one hand, goes upward from the bottom face of the upper pan 71 along the surrounding face, and on the other hand, moves within the enclosed section 74 in convection, thus resulting in the frying oil being heated from the surrounding face via the upper pan 71 as well as from the bottom face.
  • the heat contained in the heat carrying liquid 1 is easy to go to the frying oil since the fins 76 not only serve to make the convection of the heat carrying liquid 1 smooth but also are set in contact only with the upper pan 71.
  • the example application described above has applied the heat exchanger to a frying pan. It is of course applicable to a cooking pot, a boiling pan, a kettle, etc. In any applications, the heating in the processing section is rapid, efficient, and uniform since the convection of the heat carrying liquid is effective for heating from overall faces.
  • a heating source composed of nichrom wire in addition to the heating source composed of nichrom wire, use may be made of a heating source composed of semi conductor resistance element (PTC heater) and a heating source based on inductive heating.
  • PTC heater semi conductor resistance element
  • the PTC heater whose resistance increases with rising temperature, allows a large current to be applied at the start of heating with resultant rapid temperature rise; it is generally easy and safe to use.
  • the heating source based on inductive heating unlike the heating source made of nichrom wire, is free of wire breakage, has a long service life, and requires only easy maintenance.
  • FIG. 13 and 14 An example application utilizing such inductive heating for heating a heat carrying liquid within a circulation duct is shown in Figs. 13 and 14 and will be described briefly.
  • a heat carrying liquid 1 flows within a circulation duct 90.
  • a coil 91 connected to an AC power supply is wound on the outer wall of the circulation duct 90 via a heat insulating material 92.
  • a heat source 93 made of aluminium, iron, copper, etc. in a cylindrical form, is fixed on the inner wall of the circulation duct 90 via a spacer 94.
  • such a liquid as has a higher broiling point, a lower melting point, and a smaller specific heat than water is employed as the heat carrying liquid.
  • the present system allows rapid temperature rise of the heat carrying liquid, resulting in rapid temperature rise of the partner liquid for heat exchange; the present system is thus easy to use and is excellent in heat exchange efficiency especially when applied to a short-term use.
  • the heat carrying liquid When the heat carrying liquid is to be heated above 100°C, no heat is lost due to vaporization because of high boiling point, and accordingly, the heat carrying liquid may be heated to a desired high temperature even by using a heat source of extremely small output as compared with the case using water as the heat carrying liquid, and no pressureproof structurs is required; thus, the heat exchanger of the present invention is inexpensive with respect to manufacture and economical with respect to use.
  • the present invention furnishes various advantages such as that no freezing occurs because of low melting point, and that corrosion hardly occurs and the system durability is excellent because of no content of free oxygen.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Energy (AREA)
  • Sustainable Development (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Central Heating Systems (AREA)
EP84302982A 1983-05-06 1984-05-03 Wärmetauscher Withdrawn EP0126571A3 (de)

Applications Claiming Priority (10)

Application Number Priority Date Filing Date Title
JP68318/83 1983-05-06
JP1983068318U JPS59180168U (ja) 1983-05-06 1983-05-06 熱交換器
JP109502/83 1983-07-14
JP10950283U JPS6018726U (ja) 1983-07-14 1983-07-14 調理用容器
JP134671/83 1983-07-22
JP58134671A JPS6026230A (ja) 1983-07-22 1983-07-22 暖房装置
JP58171662A JPS6064186A (ja) 1983-09-17 1983-09-17 熱交換器
JP171662/83 1983-09-17
JP144634/83 1983-09-19
JP14463483U JPS6055899U (ja) 1983-09-19 1983-09-19 熱交換器

Publications (2)

Publication Number Publication Date
EP0126571A2 true EP0126571A2 (de) 1984-11-28
EP0126571A3 EP0126571A3 (de) 1985-06-19

Family

ID=27524101

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84302982A Withdrawn EP0126571A3 (de) 1983-05-06 1984-05-03 Wärmetauscher

Country Status (1)

Country Link
EP (1) EP0126571A3 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008040521A1 (de) * 2006-10-05 2008-04-10 Rehau Ag + Co Solartechnische baugruppe
GB2465806A (en) * 2008-12-01 2010-06-02 Malcolm Boultby Oil based boiler
EP2902722A1 (de) * 2014-01-31 2015-08-05 Vaillant GmbH Solarspeicher
IT201600103161A1 (it) * 2016-10-14 2018-04-14 Ruggiero Defente "apparato per il riscaldamento di liquidi"
US9982897B2 (en) 2011-12-05 2018-05-29 Timothy Michael Graboski Solar hot water and recovery system

Citations (14)

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FR2396247A1 (fr) * 1977-07-02 1979-01-26 Bosch Gmbh Robert Dispositif de chauffage utilisant de l'energie solaire
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GB2465806A (en) * 2008-12-01 2010-06-02 Malcolm Boultby Oil based boiler
US9982897B2 (en) 2011-12-05 2018-05-29 Timothy Michael Graboski Solar hot water and recovery system
US10876740B2 (en) 2011-12-05 2020-12-29 Timothy Michael Graboski Solar hot water and recovery system
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IT201600103161A1 (it) * 2016-10-14 2018-04-14 Ruggiero Defente "apparato per il riscaldamento di liquidi"

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